Feeling hypoxic and dizzy all the time may be caused by prolonged mental stress, lack of sleep, or excessive stress. If the patient has cerebral artery atherosclerosis, lumen narrowing, and stiffness of the walls and poor vascular elasticity, which can easily cause lack of blood supply to the brain and lead to lack of oxygen to the brain, the patient can experience dizziness. If the patient has diabetes and hyperlipidemia, which can lead to impaired blood circulation, the patient can also experience hypoxia due to insufficient blood supply to the brain. If the elderly have a lot of diarrhea, vomiting, and sweating, it may cause hypovolemia, which can easily cause hypoperfusion in the brain, and lead to insufficient blood supply to the brain. Patients who usually have low blood pressure can also cause patients to feel hypoxic and dizzy all the time. This can also occur if the patient has hypertension, which can cause vasospasm when the blood pressure is too high. Some heart diseases, such as severe arrhythmia and coronary artery disease, can cause the heart to pump less blood, which also tends to cause hypoperfusion in the brain, and cause symptoms of hypoxia. This condition can also occur in patients with anemia and should be treated accordingly for different causes.